package cn.lsc._01_sync;


import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.message.MessageExt;

import java.nio.charset.StandardCharsets;
import java.util.List;

public class Consumer1 {
    public static void main(String[] args) throws MQClientException {
        // 实例化消费者
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_consumer_name");
        // 设置NameServer的地址
        consumer.setNamesrvAddr("localhost:9876");
        // 订阅一个或者多个Topic，以及Tag来过滤需要消费的消息
        consumer.subscribe("sync","shit");
        // 注册回调实现类来处理从broker拉取回来的消息
        consumer.registerMessageListener(new MessageListenerConcurrently() {
            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> list, ConsumeConcurrentlyContext consumeConcurrentlyContext) {
                for (MessageExt messageExt : list) {
                    System.out.println(new String(messageExt.getBody(), StandardCharsets.UTF_8));
                }
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });
        // 启动消费者实例
        consumer.start();
    }

}